Piston-ring tool



Aprifl 15 1924.

I T. B. FINL AY PISTON RING TOOL Filed Dec. 19,

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Patented Apr. 15, 1924 TI'IOMAS B. FINLAY, OF MIAIVII, FLORIDA.

PISTON-RING TOOL.

Application filed December 19, 1921.

To all whom it may concern Be it known that I, THOMAS B. FINLAY, acitizen of the United States, and a resident of Miami, in the county ofDads and State of Florida, have invented certain new and usefulImprovements in a Piston-Ring Tool, of which the following is aspecification.

My invention relates to piston ring tools and more particularly to adevice of this type applicable with equal facility to removing orapplying piston rings to pistons.

The construction of my improved device is such that the removal ofpiston rings may be accomplished conveniently and with dispatch. Theadvantages concurrent with the use of the tool as a piston ring removerresult from its adjustability, both radially and circumferentially andthe provision of beveled edges on the several arms of the tool. In thismanner the arms of the tool may be insertedseparately and movedcircumferentially, thereby forcing the piston ring from its groove inthe piston and retaining the same thus disengaged until by lifting thering up over the tool, it is removed from the piston. V

The application of the piston rings may be accomplished with equalfacility as the construction of my improved invention lends itself withequal adaptability to this operation.

Other features and advantages prevalent in my improved device will bemade more apparent and the construction and operation of the same morefully described and illustrated in the accompanying specifications anddrawings in which:

Fig. 1 is a perspective view of my im proved device in one position on apiston,

Fig. 2 is a top plan view of a piston with my improved tool appliedthereto in one of its adjusted positions,

Fig. 3 is a longitudinal sect-ion through the tool, the piston to whichit is applied being shown in elevation, and,

Fig. 4: is a transverse section of the tool in a collapsed position.

Referring now' more particularly to the drawings, it will be seen thatthe numeral 10 represents a base plate which is in the form. of a metaldisk and to which there is attached a plurality of arms, here shown asthree in number, and designated as 11, 12 and 13 respectively.

Each of these arms is preferably L-shaped and each is provided with whatwill be Serial No. 523,517.

termed a horizontal portion 14 and a vertical portion 15. The horizontalportion of each arm is formed with an elongated slot 16 through whichpasses a stud 17 which is permanently riveted to the base plate 10 andcarries on its other end a handle or knob 18.

Obviously the arms 11, 12 and 13 are adjustably secured to the base 10and each may be adjusted radially with respect thereto andindependently'of each other. Likewise it is obvious that each of thearms 11, 12 and 13 may be rotated or moved circumferentially with thestud 17 as a center. The longi tudinal edges of the vertical portion 15of the arms are each beveled as shown at 19 (see more particularly Fig.4) for a purpose which will be more fully hereinafter described.Likewise the lower end of each of the arms, 11, 12 and 13 is beveled asshown at 20, (see particularly Fig. 1), these bevels being so arrangedthat when the arms are collapsed or superimposed one upon the other, thebeveled edges of the three arms form one continuous beveled surface.

IFor purpose of illustration, a piston 21 of any of the ordinary typesis shown, which piston is provided with the usual circumferentialgrooves 22 for the reception of the piston rings which are indicated bythe numeral 23.

In using my improved tool, the arms are separated such as clearly shownin Fig. 1. In this condition, the beveled surface on arms 11 is forcedunder the piston ring or rings, if several are to be circumferentiallyremoved at the joint or joints thereof. By reason of the beveled surfaceat the edge of the arms, the insertion between the piston 21 and therings 23 is facilitated and as the armis forced circumferentially aroundthe piston, the ring or rings are forced outof the groove 22. After arm11 is inserted, it

is moved far enough around the piston to allow arm 12 to be inserted soas to follow arm 11 and arm 13 to be inserted following arm 12; then,arm 11 is moved circumferentially around the piston until it obtains theposition shown on Fig. 2; arm 12 is then moved circumferentially aroundthe piston until it reaches the position as shown in Fig. 2; arm 13 isleft then in the posit-ion shown on Fig. 2. The base plate 10 at alltimes from the beginning to the end of the operation abuts the end ofthe piston 21. This operation forces the piston rings from engagementwith their circumferential grooves 22 and they are held thus byengagement with the arms 11, 12 and 18. Obviously, the ring or ringstend to force the several arms inward ly, but as each arm abuts the sideof the piston it stops and the ring or rings are held clear of theircorresponding grooves. It is only necessary then to take hold of thering or rings and lift them, either severally or in mass, up over thetool and .the piston from oil the piston.

The beveled edges 19 facilitate the dis placing of the arms 11, 12 and13 circumterentially inasmuch as the bevelled edges engage the ring orrings and force them out of their corresponding grooves 22. Furthermore,these bevels 19 eliminate the possibility of scarring or otherwisemarring the piston or the piston ring.

As has been heretofore mentioned, my improved tool may be used withequal facility for applying piston rings to a piston, and this isaccomplished in the following manner :-The tool is placed upon thepiston 21 in the manner and with the arms as shown in Fig. 2; that is,the arms are distributed to spaced circun'iterential points. The pistonrings are thereupon slipped over the tool until they are disposedopposite the grooves in which they are to rest. Thereupon, the arm 13 ismoved circumiterentially in the direction opposite from that used intaking oft the ring until the arm 13 slips out from underneath thepiston ring at the opening in the ring 22 and the arm 11 is movedcircumterentially around the piston from its position in Fig. 2 until itslips from underneath the ring through the opening 22. Then, by takinghold of the knob 18 and raising it up, the tool is disengaged and therings are each allowed to slip into the grooves 22 throughout theirentire length and ring is allowed to entirely rest within its associatedgroove.

By forming the horizontal portion 1 1 of the arms with slots. therebyadjustably connoctiug these arms to the base 10, the tool is capable ofuse with the pistons varying considerably in size. Furthermore, itshould be noted that the length of the vertical portion of the arms canbe lengthened or shortened to suit with convenience the type of pistonupon which this tool is to be used, this portion 01"" the arms beinglengthened if there are piston rings disposed a considerable distancefrom the end of the piston.

lVhile I have shown three arms in'con nection with my improved tool, itis obvious that the number of arms may be varied without departing fromthe spirit and scope of the present invention. It is likewise obviousthat various other modifications in the structure illustrated herein maybe made without departing from the spirit and scope of my invention, andto this end, I reserve the right to make any such changes as may comewithin the purview of the accompanying claims.

Having thus described my invention, What I claim is:

1. A piston ring tool comprising a plurality 01 arms, means forconnecting said arms together, said means permitting said arms to beadjusted circumt'erentially to any angle relatively to one another.

9.. A device of the class described comprising a base member, aplurality of right angularly bent arms and means for securing said armsto said base member, whereby said arms may be adjusted radially withrespect to said base member and separately disposed at any angle withreference to each other.

3. A device of the class described comprising a plurality of arms, meansfor connecting said arms together whereby they may be adjustedcircumferentially to any angle relatively to one another, said armsbeing provided with beveled surfaces whereby they may be insertedbetween a piston ring and piston.

41-. In a piston ring tool, a base plate, a plurality of arms secured tosaid base plate, said arms being separately adjustable radially andcircumferentially relatively to one another to any desired angle, said ams being formed with beveled edges whereby said arms may be insertedbetween a piston ring and piston and thereafter distributedcircumferentially for disengaging the piston ring from engagement withsaid piston.

In a piston ring remover, a base, a plurality of right angularly bentarms, said arms being provided with elongated slots, means passingthrough said slots for connecting said arms to said base, said slotspermitting radial adjustment of said arms, said arms being provided withbeveled sides and ends whereby they may be inserted between a piston andits associated piston ring and said arms thereafter independently movedcircumferentially to any desired points, thereby forcing the piston ringfrom engagement with the piston.

6. In a tool for removing piston rings from pistons, a base member, aplurality of right angularly bent arms, said arms being formed withelongated slots, a stud projecting from said base member and throughsaid slots, a knob formed on said stud for securing said arms to saidbase member, said arms being formed with beveled sides, the free end ofeach arm being beveled so that said arms may be inserted between thepiston and its associated piston ring and the arms independentlydistributed to any desired spaced circumferential positions.

THOMAS B. FINLAY.

